Neutrophils. A type of immune cell that is one of the first cell types to travel to the site of an infection. Neutrophils help fight infection by ingesting microorganisms and releasing enzymes that kill the microorganisms. A neutrophil is a type of white blood cell, a type of granulocyte, and a type of phagocyte.
If you exclude the spouse with the DUI from your policy your insurance would not cover that person if they were involved in an incident in your car. If you are concerned about liability for his driving habits, a better way would be to obtain legal advice as to car ownership with him and to act on that.
If your secondary insurance is from your employer's retirement package, you will have to contact the insurer to find out the details of coverage. The secondary coverage may include coinsurance for Part A or Part B, and it may also cover prescription drugs. If you're covered by your spouse's plan and your spouse is still working, Medicare is the secondary payer.